Hg2+-induced self-assembly of a naphthalimide derivative by selective “turn-on” monomer/excimer emissions

Synthesis and spectral characterization of a new blue fluorescent tripod for detecting metal cations and protons

“…Recently, special attention has been devoted to tailored monomeric 1,8-naphthalimide systems for the determination of cations [12][13][14][15][16], and anions [17][18][19] in aqueous and no aqueous media. A new strategy in the sensors design is to use dendritic and branched molecules because of their properties deriving from the well-defined, tridimensional structure [20].…”

Ratiometric Fluorescent Chemosensor for Zn2+ Ions in Environmental Samples Using Supermicroporous Organic‐Inorganic Structures as Potential Platforms

“…The results revealed that the emission intensity increased as the Zn 2+ concentration increased, thereby proving the sensing ability of L1 for Zn 2+ ions under visible light or UV (365 nm), as shown in Scheme . The enhanced emission intensity could cause the coordination of Zn 2+ ions with the N atom of L1; such coordination inhibits photoinduced electron transfer (PET) and favors excimer formation …”

“…The enhanced emission intensity could cause the coordination of Zn 2 + ions with the N atom of L1; such coordination inhibits photoinduced electron transfer (PET) and favors excimer formation. [36] The pH level is the key operational parameter in the fluorometric and detection of Zn 2 + ions because it affects the structural arrangement of the optical probe and the distribution of the Zn 2 + ion species. The chemical structure of L1 revealed different heteroatoms, including oxygen and nitrogen groups, which may be affected by changes in the pH values.…”

Highly sensitive and selective Hg2+-chemosensor based on dithia-cyclic fluorescein for optical and visual-eye detections in aqueous buffer solution

“…In the marine system, inorganic mercury (Hg 2+ ) can be converted to methyl mercury by bacteria and then absorbed into biological membranes and entered into human food chain [2][3][4][5]. Human, as the final consumer, can collect more mercury which can lead DNA mutation, central nervous damage and endocrine system disorder as well as Minamata disease [4,[6][7]. Considering the high toxicity of mercury, the United States Environmental Protection Agency (U.S. EPA) specifies a standard for the maximum allowed level of inorganic mercury in dietary sources, such as 0.55 ppm in edible fish and 2 ppb for Hg 2+ in drinking water [8].…”